Changeset b539af8 in rtems for cpukit/libmisc/stackchk/check.c

Timestamp:

01/26/22 22:00:04 (5 months ago)

Author:

Kinsey Moore <kinsey.moore@…>

Branches:

master

Children:

b519e50

Parents:

2145e0c7

git-author:

Kinsey Moore <kinsey.moore@…> (01/26/22 22:00:04)

git-committer:

Joel Sherrill <joel@…> (01/27/22 19:07:30)

Message:

cpukit: Prevent error with disabled stack checker

When the stack checker is not enabled, the stack checker reporting
function can still be called. This prevents that call from performing a
null memory access in trying to find the high water mark if the stack
checker was never initialized.

This also introduces a test to ensure this call does not cause a crash.

Closes #4588

File:

• cpukit/libmisc/stackchk/check.c (modified) (1 diff)

cpukit/libmisc/stackchk/check.c

@@ -411 +411 @@
   void     *high_water_mark;
 
+  /* This is likely to occur if the stack checker is not actually enabled */
+  if ( stack->area == NULL ) {
+    return false;
+  }
+
   low  = Stack_check_Usable_stack_start(stack);
   size = Stack_check_Usable_stack_size(stack);